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We manage the approvals process through design, surveys, and wayleaves where required, and we run contestable works through an accredited ICP route when it improves timelines or cost certainty. We keep the interfaces tight between the DNO or IDNO, the ICP, civils teams, M&E contractors, and the principal contractor, and we coordinate MPAN and metering so energisation is not held up. From testing and commissioning through to close-out paperwork, we keep it joined up and delivered.
What are DNOs?
Distribution Network Operators (DNOs) are licensed companies that own and operate the network of towers, transformers, cables and meters that carry electricity from the national transmission system and distribute it throughout Britain.
DNOs distribute electricity from the transmission grid for a large geographical area, whereas IDNOs distribute electricity from either DNOs, or the transmission network, to smaller local areas. Both DNOs and IDNOs are responsible for connection line faults and maintenance.
DNOs manage distribution networks from 240V to 400 kV through underground and overhead power lines, this covers commercial, industrial and residential properties. They’re also responsible for allocating Meter Point Registration Numbers (MPRNs), the unique identifiers for individual supply points that correspond to respective regions. Their systems connect directly to the central database of electricity supply points.
As DNOs are natural monopolies, they must be regulated by Ofgem to protect consumers from overcharging. Ofgem also stipulates that DNOs must connect customers when requested, while IDNOs do not. Costs are based on connecting the customer to an electrical supply, reinforcing networks, and rebates to the previous connection operator.
There are 14 licensed DNOs owned by six different groups that cover specific geographically defined regions of Britain.
All DNO groups and their corresponding area of responsibility
Selected supplier: None
What we manage
We act as your delivery lead across the full DNO and IDNO lifecycle.
Early-stage support
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We start by confirming the most practical route to supply, whether that means reinforcement, reconfiguration, a new connection, or an IDNO option where it makes sense. We capture the load and site data properly upfront so the first submission is accurate, then we build a programme around the real dependencies, including design, civils, outages, commissioning, and energisation.
Applications and offers
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We submit the application and manage the stakeholders around it, including chasing progress, handling clarifications, and responding to technical questions as they come back. When the offer lands, we review the scope and the small print, including exclusions, liabilities, and costs, then coordinate acceptance, payments, and key dates so nothing drifts.
Delivery and energisation
What information do you need to start?
At minimum we need the site address, what you are building or changing, your required capacity (kVA/MVA), target energisation date, and any known site constraints. If you have a single line diagram, layout, or previous DNO correspondence, that helps us move faster.
When should we involve Nationwide Utilities?
As early as possible. If the connection is on the critical path, getting the route, data, and programme right upfront is usually what prevents delays later.
Do you work with both DNOs and IDNOs?
Yes. We manage the process with the relevant DNO for the region and can also assess IDNO options where they are appropriate for the project.
What is the difference between a DNO and an IDNO in practice?
A DNO owns the regional network and issues the connection offer for that area. An IDNO can sometimes adopt and operate local networks and may offer an alternative commercial structure on certain schemes. The right route depends on the site, timeline, and delivery constraints.
Can you speed up a DNO connection?
We cannot override DNO lead times, but we can reduce avoidable delay by submitting correctly first time, managing clarifications quickly, and coordinating contractors, outages, and approvals so the programme does not stall.
What are “contestable works” and can you deliver them?
Contestable works are parts of the connection that can be delivered by an accredited Independent Connections Provider (ICP) rather than the DNO. Where it improves timeline control or cost certainty, we manage the delivery via an accredited ICP route and keep the DNO interface tight.
Can you manage diversions and disconnections?
Yes. We manage diversions, disconnections, and supply alterations, including planning around outages and coordinating the parties involved.
Do you organise MPANs and metering for energisation?
Yes. We coordinate MPAN creation where applicable and manage the metering steps required so energisation is not delayed by admin or sequencing issues.
Do you handle wayleaves and third-party permissions?
We coordinate the process and keep it moving, including surveys and the steps needed for wayleaves. Where legal input is required, we work alongside your legal team and the relevant landowners.
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